From: Marko Mäkelä (marko.makela_at_hut.fi)
Date: 2003-04-30 08:21:23
On Tue, Apr 29, 2003 at 10:13:46PM +0200, Laze Ristoski wrote: > That's not the way it seems to me. Let's say that you write 0 at $D020, > in an infinite loop. The dots (or sparkles as Marko calls them) will only > appear at the border. If the VIC plots the paper area during the write > access, you won't see any dots. Now suppose you write 0 to $d021 in an infinite loop. The sparkles should appear in the text area. I call them sparkles, because on my C128, their width varies from about half a pixel to a full pixel. > Aren't there any sparkle-free VICs for C128? I'm not aware of any. > Strange thing is that they occasionally disappear. And the lines are > (as I already mentioned) sometimes more, sometimes less visible. Do the sparkles disappear completely on your machine? Try producing vertical sparkle bars by writing a 63- or 65-cycle loop of sta $d020 on a blank screen. > I have just tried to put an old 6569 VIC on a new board. The result > was no picture at all. I don't dare to do the other way (new VIC on > old board). You think I can fry it? The analog parts of the new VIC run off 9 volts while the old VIC needs 12 volts. If I remember correctly, Andreas Boose told me that the new VIC overheats but works in the old C64. Do it on your own risk. :-) Marko Message was sent through the cbm-hackers mailing list
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